| 摘要 |
An aliphatic hydrocarbon solvent solution obtained by extracting dioxins contained in a specimen such as soil with an aliphatic hydrocarbon solvent is supplied to an alumina layer 33 side of a sample-preparation column 30 in which the alumina layer 33 is placed on a carbon material layer 32. Upon flowing and passing of an aliphatic hydrocarbon solvent through the alumina layer 33 and the carbon material layer 32 in this order, the dioxins contained in the aliphatic hydrocarbon solvent solution are trapped in these layers. Then, one extracting solvent among toluene, a mixed solvent of toluene and an aliphatic hydrocarbon solvent, and a hydrophilic solvent capable of dissolving dioxins is supplied to the sample-preparation column 30 in the direction opposed to the passing direction of the aliphatic hydrocarbon solvent, the dioxins trapped in the carbon material layer 32 and the alumina layer 33 are extracted to obtain a sample for analysis of dioxins.
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